1687-6180-2010-392782 1687-6180 Research Article <p>Advances in Modal Analysis Using a Robust and Multiscale Method</p> PicardCécilececile.picard@sophia.inria.fr FrissonChristianchristian.frisson@uclouvain.be FaureFrançoisfrancois.faure@inrialpes.fr DrettakisGeorgeGeorge.Drettakis@sophia.inria.fr KryPaulGkry@cs.mcgill.ca

REVES/INRIA, BP 93, 06902 Sophia Antipolis, France

TELE Lab, Université catholique de Louvain (UCL), 1348 Louvain-la-Neuve, Belgium

EVASION/INRIA/LJK, Rhône-Alpes Grenoble, France

SOCS, McGill University, Montreal, Canada, H3A 2A7

EURASIP Journal on Advances in Signal Processing 1687-6180 2010 2010 1 392782 http://asp.eurasipjournals.com/content/2010/1/392782 10.1155/2010/392782
13201029620101810201021102010 2010Cécile Picard et al.This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a new approach to modal synthesis for rendering sounds of virtual objects. We propose a generic method that preserves sound variety across the surface of an object at different scales of resolution and for a variety of complex geometries. The technique performs automatic voxelization of a surface model and automatic tuning of the parameters of hexahedral finite elements, based on the distribution of material in each cell. The voxelization is performed using a sparse regular grid embedding of the object, which permits the construction of plausible lower resolution approximations of the modal model. We can compute the audible impulse response of a variety of objects. Our solution is robust and can handle nonmanifold geometries that include both volumetric and surface parts. We present a system which allows us to manipulate and tune sounding objects in an appropriate way for games, training simulations, and other interactive virtual environments.

Publisher note

To access the full article, please see PDF.